To my surprise, the drawing I posted turned out not to be the mirror on my coach after all.
After studying my mirror, I discovered that removing the assembly was rather simple. A 9/16" socket to remove the bolt in the center of the mounting fixture was the ticket, then unplugged the electrical connector and the mirror was off. This allowed me to slip the chrome cover off the mounting fixture and revealed the 4 screws securing the mount to the fiberglass.
Was I shocked to find plastic wall anchors in the fiberglass and BIG sheet metal screws holding the mirror on. No wonder it was loose!
I attempted to look inside, under the dash for the holes but could not locate them. Luckily, when I climbed my ladder and looked through the hole the wiring protruded through, I saw daylight and the ground? I opened the front generator door and looked up and bingo, there were the 4 holes.
I took a trip to the hardware store to purchase 4 1/4 x 20 by 3" machine screws, fender washers and nylock nuts to remount the mirror. After drilling out the holes to remove what was left of the plastic anchors, I simply pushed the 4 new screws through, added the fender washers behind and then the nuts for a very secure mounting of the fixture.
Then I simply slid the chrome cover over the fixture, reconnected the wiring harness, slid the mirror arm down into the fixture and reinserted the bolt from below. Now the mirror is rock solid. I'm lucky the thing didn't fall off!
Attached are pictures for a reference.
Monaco Owners Club